Did you know that Olga Rubtsova, who was born on this day in 1909, is the only player in history ever to become a world champion in both over-the-board and correspondence chess?
She became the 4th women's world champion in 1956, dethroning Elisaveta Bykova and the 1st women's world correspondence champion in 1972!
?: The photo depicts Olga Rubtsova on a 2001 Yugoslavia stamp
